Added fallback for missing mb_strlen() function
Added fallback for missing mb_strlen() function

Signed-off-by: Ender-HubN <2846afcde63a7f2595d7d7be2522678d18619be5@ender.mx>

Pasarkode/pheanstalk,lcwxz1989/pheanstalk,dcb9/pheanstalk,pda/pheanstalk,jbboehr/pheanstalk,augustash/pheanstalk,jhammer/pheanstalk